The Birka Jazz Archive is a treasure trove of record jackets from all eras of jazz. American releases are grouped by label (for example, Columbia, Blue Note, Atlantic, etc.) with, in some case, further sub-categorization by designers or visual artists (such as the amazing David Stone Martin). European releases are sorted by country (France, Sweden, Germany, etc.) and it all adds up to a fabulous online resource for jazz fans and graphic design fans alike.